Cylinder lock



March 6, 1945.

J. c. BARTHO CYLINDER LOCK Filed Feb. 5, 1944- 2 Sheets-Sheet l U rINVENTOR 870/1 15/2/77? 0 RNEY Mairch e, 1945. J. c. BYARTHO 2,370,708

CYLINDER LOCK Filed Feb. 3, 1944 2 Sheets-Sheet 2 INVENTOR Patented Mar.6, 1945 CYLINDER LOCK V '1 John C. Bartho, Flushing, N. Y., assignor of-one-,

1 half to Andre Tellier, New York, N. Y.

.6 Claims.

' This invention relates generally to locks and more particularly to theso-called Yale r cylinder I type of lock.

In the ordinary Yale lock, the key is inserted for aligning the plungerpins in the cylinder in order to free the cylinder for rotation and thenan additional turning of the key by the operator is necessary in orderto turn the cylinder in order to retract the locking bolt. The door mustthen be pushed inwardly to open it. The additional turning movement ofthe key is often difiicult, often necessitating the holding. of the knobof the door with one hand and the turning of the key with the otherhand, making it necessary to have both hands free which is not alwaysthe case.

Also in the ordinary Yale locks,-the front or face of the plug memberisexposed so that its movement may be seen and felt thereby assisting inthe unauthorized manipulation of thelock;

Also in the ordinary lock of this type, a single rotatable cylinder isprovided, which, while it affords a measure of segurity, is readilymanipulated by a simple tool. 7

Furthermore in the ordinary locks, with which applicant is familiar,provision is made for opening the door from the inside of the door byturning a knob which retracts the locking bolt, but in order to hold theparts in open position it is necessary to slide a separate springpressed latch Application February a, 194 Serial No. 520,849.

member or finger piece into interlocking position with the moving partsof the look. This holding,

mechanism adds to the expense of manufacture of the lock. r

It is a primary object of my'invention to simplify the legitimate keyopening operation of the Yale type lock by eliminating the necessity formanual turning of the cylinder and by substituting therefor an automaticturning-whereby the locking mechanism is moved to open position by themere insertion of the key into the keyway of the cylinder and the doormay beopened merely pushing inwardly on the door.

Another object is to. provide additional means of security by providing,a second cylinder with plunger pins which must be manipulated beforethe locking mechanism isin position for opening.

A further object is to simplify the setting of the locking parts to openposition from the inside of the door by providing means in common formoving the locking parts to open position and for holding said parts inmoved open position.

In the drawings, I I t Fig. 1 is a view of a fragment of a door and doorframe with a lock embodying my invention,

some of the parts being broken away for clearness. Fig. 2 is a view ofthe'locking mechanism in the casing with the cover removed and parts inI section. V Y I Fig. 3 is a sectional view taken on the plane of theline 33 of Fig. 2 and showing the slidin latch in projected latchingposition.

Fig. 4 is view similar to Fig. 3 but showing only part of themechanismthereof and showing the latch in retracted position.

Fig. 5 is a sectional view taken through the door and locking mechanism,parts being shown broken away. g

Fig. 6 isa sectional view taken on the plane of the line 8-6 of Fig.5.

Fig. 7 is a sectional view taken on the plane of the line 1-1 of Fig. 5.

Fig. 8 is an exploded perspective view of the locking bolt andassociated parts, parts bein broken away and parts being shown'insection.

Fig. 9 is a detail'view showing the camming device for holding thelocking parts in open position. i

Fig. 10 is a perspective'view of modified apparatus for, holding theplunger pins against movement'to prevent unauthorized manipulation ofthe lock.

My improved lock comprises a sectional casin or housing In fastened toadoor II or the like by screws l2 and a keeper or socket member I3 ingl1 and centrally thereof is an integral plug member l9. Positioned inthe housing [1 above the plug i9 is a cylinder-2t and positioned belowthe plug [9 is a similar cylinder 2!. Each cylinder is formed with a rowofspaced recesses 22 in each of which is slidably mounted a plunger pin23 urged outwardlyofthe recess by a coil spring 24. The recesses in thecylinders are oppositely disposed. 1 r

The plug I9 is formed with anaxially'disposed keyway 25 which extends tothe rear of the plug and communicates at the frontthereof with a keyslot 26 formed in the plate 18. The upper wall of the plug, as viewed inFig. 5,'is formed with spaced openings 21 which communicate with thekeyway 25, and with which the recesses 22 in the upper cylinder Zllare'adapted to align; The lower wall of the plug is formed with spacedopenings 28 which communicate with th keyway and with which the recesses22 in the lower cylinder 2| are adapted to align. The aligned recessesand openings are adapted to receive the plunger pins 23.

The cylinders 20 and 2| are rotatable axially in the housing l1 androtate in unison by means of a gear segment 29 fastened to the inner endof each cylinder and so positioned that their teeth 30 are continuouslyin mesh. The cylinders, plug and associated parts may beheld in positionin the housing H by a washer 3| screwed or otherwise fastened to theinner edge of thehousing. 7

The casing in is fastened to the rear of the door and comprises an innersection 32 and an outer or cover section 33 in which are housed thelocking bolt and mechanism for moving said bolt into and out of lockingposition and for holding said bolt out'of locking position. This g onthe post between said -sleeve and cam is a washei n iernber 33. This"washer has an integral finger '40 projecting from the periphery thereofin one direction and an integral arm member 4| on its peripheryprajeamgm an opposite direction, said arm terminating in a lug d2 whichextends'at right angles to the body of the arm. A-collar 4 3is securedon. the end of the post and hasa'projection or lug 44 formed thereon.

The hollowlpos't 3'4 and the elements fastened theretoare 'rotatably'mounted and are urged to fifgtate by means-0i a spiral spring 45 whichhas one'end fastened to a pin on the nose J3?! of cam 33 and its other,end fastened to the side Well. h fiet s es fiqn 2- a The locking; boltei' la .'tch 'memberv is indicated generally at "46 in Fig. 3 andcomprises a body .portion Aland an integral extension :48 formed on oneend of thebody and disposedin a planeoffset from the planebf said body.The extension is. formed with a 'centra l slot 49 forming separate armsSQ'and -EL Arm 5|lterrninates at outer en'd rin a lug 52, disposed atright angles to the plane ofQ-thearrn in the fdirection oi the portion.'On the ffree e'nd ofthe otherar-m 5-| an elongatedbar 53textending atright angles lib-the arm 5| and also projecting slightly in the samedirection as lug 52. v 1 ,y v

Pivotally mounted on the dtherend of the body portion 41 is a-boltmember 55, so mounted on the-pivot post 5'5 that its. enlarged noseportion 517 projects outwardly ofand forms an extension pi thebodypgrtion, Qn the side of the bolt '55 opposite to the noseportion 51,is a projection or lug 5 8-, whic;h lug normally positioned be:

hind and in line with an openingli formed in the plane surface of thebody-41. a V

- The latchingimember o-r-frame 46 is positioned adjacent the-outerendof the hollow -post 3 l, with its spaced arms =and5|looselystraddling the outer end 'of the post, withthe lug '52 on arm 50projecting :toward the cover of the casing.

A-latching slide indicated 'generally ate!) in' *Fig. 8 :isiadapteditoislidezon the datching frame 46. -This. slide comprises azplate 61,for-med with The outer end of the post an elongated slot 62 providingspaced arms 63 and 64. On the imperforate end of the plate is a rigidnose portion 65 which is offset from the plane of the body of the plate.A curved guide plate 66 is formed on the outer edge of each of the arms63 and 64, and the outer end of arm 63 is formed with an enlarged offsetportion 61. The arms 63 and E4 loosely straddle the hollow post 34 andslide on the arms 56 and 5| of the latching frame 46 guided .bythecurved plates 66 which partially encirclethe arms 50 and 5|, and therigid nose 65 when in latching position I is disposed behind the lug 58on the pivotal bolt thereby preventing movement of said bolt.

Extending centrally through the hollow post 34 is an elongated flat bar63, the inner end of which is fastened to a projecting lug G9 fastenedto the upper cylinder 20. In passing throughthe post, the bar passesthrough a slotted transverse wall 1|! formed on the interior of thepost, so that upon turning of the post the wall it! turns the bar 68.

A knob or handle H is secured to the outer end of a spindle .12 which isjournalled in the wall of the opening of the cover 33. The outer end ofpost 34 and the outer end of bar 68 extend into saidspindle. I Thespindle 72 projects inwardly of the cover 33 and on its inner endadjacent said cover is fastened a cam member 73 formed with shoulders hion each side and an enlarged offset portion 15 centrally of saidshoulders.

In using the lock, a "key 16 with duplicate or opposite working faces-is inserted through the key slot and into the keyway' in the plug i9.The upper operating or working face of the .key moves the upper plungerpins .23 outwardly or upwardly and the lower operating face moves theplunger pins in the lower cylinder 2| outwardly or downwardlysimultaneously. Thus the plunger pins in "the z pper cylinder 2B. aremoved into alignment with each other and the plunger pins in the lowercylinder 2| are moved .into alignment at -the same time. 'When the pinsare thus aligned the cylinders 2'0 and '21 are free to rotate. The'spring- 45 immediately goes into action turning the member 33' andassociated parts including 'the hollow. post 33 to which it is secured.Rotation of the post turns the bar 68 and this movement of the baristransmitted 'to the upper cylinder 20 .andt'urn'ing o'fthe uppercylinder is transmitted to the lower cylinder 2| through theintermeshing segments 29. Each cylinder is cut away as indicated at '23.to permit removal of the/key after the cylinders are turned.

Upon theturning of the hollow .pos't :34, the rlug 44 on collar 43is-carr ied around into engagement wi'tha pivoted .pawl 11 and movessaid pawl away from the inner end of :bar 53 of latching frame 46, saidpawl normallyholding-said frame against movement.- The :paw-l is urgedinto holding position by a spring '18. The pawl may be manually moved=dut.:of engagement with the.

latching rrame by.ia :lever lei-fastened to one end of the 'pawl andextending to the exterior of the casing as seen in Fi'gH-Z. When thepawlis thus moved away ffrom'fthe latching frame, said frame is'free tosues.

The nose portion '31 of ;the cam member, '38 is in interlockingengagemeritwith La 'l in "8.0 on latching slide '50,.an'dmoyementotsai'dnoseportio-n moves the slide and the rigid nose H5 out of latchingengagementwith the'qpivotedbolt lug aam'zoa All of the elements of:thelock are now in condition for opening thelock and the doors An inwardpush on the door causes the pivoted nose 57, which is now free to turn,to-strike the keeper I3 and swing around and inwardly out I ofengagement with the keeper l3, opening said door. During this pivotalmovement of the nose 51, the lug 58,.swings into and through theopeninner wall of the lower section 32 ofthe casing I and its other endfastened to a bolt 82 on the pivoted bolt 55, forces said pivoted boltinto normal projected position. s

Now when the door is swung back or returned for closing, the pivotedbolt 55 being projected I strikes the keeper l3 which causes thelatching frame 46 and associated-parts to slide inwardly. Upon inwardmovement of this frame, its inwardly extending bar 53 engages the finger40 on the freely mounted-washer 39 and simultaneously the nose portion31 on cam 35 engages the opposite lug 42 on said washer, which engage-'ment turns the hollow post 34 and associated parts including the longbar 68, which in turn moves the cylinders and 2| bringing their re-,cesses into alignment with the openings'in plug 19 and thus permittingthe plunger pins to assume their normal interlocking positions.

Continued closing movement of the door brings the pivoted nose beyondthe striker portion of the keeper into alignment with the socket portionof the keeper at which time the coiled spring 8| forces the latchingframe 46 outwardly. At the same time, a small coiled spring 83 which hasone end fixed to the nose portion 31, as indicated at B4, and its otherend fixed to the sliding latch offset portion 61 urges and forces saidslide latch with its fixed nose 55 into interlocking position with thelug 58 on the pivoted nose 55;

The locking elements are now in locking position.

Provision is made for opening the door and look from the inside. This isaccomplished by first tilting the pawl 11 out of the way of the bar 53of the sliding frame 46, by means of the lever 19. The knob H is thenturned carrying the cam 13 around with it. v This cam is so disposedthat its shoulders 14 are opposed to the lug 52 and the outwardlyprojecting part of bar 53,:

and upon the turning of the camone of its shoulders 14 engages eithersaid lug 52 or projection 53 and slides the latching frame 45 inwardlymoving the locking bolt or nose 55 away from the keeper l3 so that thedoor may be opened. Continued turning of said-cam by means of the knobII will cause the engaging shoulder 14 to move around free of theengaged lug or projection and bring the oifset central portion 15 of thecam into a position between and inv ento be swung into the alignedgrooves of the pins to hold said pins against movement. The free end ofthe bar is formed witha cam noseportion 88, which cam portion ispositioned in, the path of movement of the key 89. Upon insertion ofsaid key the entering edge of the key engages the cam portion 88 andmoves it away from the plunger pins 85 permitting the key to moveinwardly toalign the pins as is. usual. A spring 9llmay be provided tourge the bar intointerlocking position with the pins. By reasonof'thisbar 81, it is impossible to reach the pins for manipulating them. 1 i

It will be noted that the. pawl member 11 that holds the sliding lockingbolt 46 from moving inwardly is positioned in the rear of the casing sothat it will be impossible to reach it with a tool to pick it, and itwould be futile to work on the pivoted nose of the lock to force itinwardly in view of the holding pawl.

Itv will also be noted that the cam member I3 which is used for openingthe look from the inside also serves to hold the part in open position.1

It will also be noted that there are no movable parts on the escutcheonplate [8 which might be seen or felt as intheordinarylock. I

It will also be noted that it is not sufiicient'to pick the, plungerpins .in one cylinder but that such pins would also have tobe picked'inthe other cylinder before the lock cylinders could be rotated.

I claim:

1. A cylinder lock including a rotatable cylinder, radially movableplunger pins in said cylinder, a plug having a keyway and openings forreceiving said pins in interlocking position to prevent rotation of saidcylinder, a key for moving said pins out of interlocking relationshipupon insertion thereof into the keyway,

a locking bolt operatively connected to said cylinder and means forautomatically'rotating said cylinder upon the movement of said pins out'of interlocking position whereby said locking bolt is adapted to bemoved out of interlocking position.

2. A cylinder lock including a rotatable cylinder, radially movableplunger pins in said cylinder, a plug having a keyway and opening forreceiving said pins in interlocking position to prevent rotation of saidcylinder, a key for moving said pins out of interlocking relationshipupon insertion thereof into the keyway, a locking bolt operativelyconnected to said cylinder and spring actuated means for automaticallyrotating said cylinder upon the movement of said pins out ofinterlocking position whereby said locking bolt is adapted to be movedout of interlocking relationship.

3. A lock of the kind described, in combination, a rotatable cylinder,radially movable whereby upon movement of said pins out of inspringmeans and moves the sliding latch out of latching engagement with saidpivotal nose poron, ,t l

4. Alcohol the kind described, in combination a. rotatable cylinder,radially movable plunger 'pins in said cylinder, a plug having a keywayand openings for receiving said pins in interlocking relationship toprevent rotation of said cylinder, a key for moving said pins out ofinterlocking relationship upon the insertion of said key into saidkeyway, a rotatable post, spring means for urging rotation of said post,a locking bolt having a pivotally mounted locking nose portion, aslidable latch member having a nose portion in latching engagement withsaid locking nose,

relationship to prevent rotation of said cylinder,

a key for moving said pins out of interlocking relationship upon theinsertion of said'key into said keyway, a rotatable post, a springdevic'e for urging rotation of said post, a locking bolt having apivotally mounted locking nose portion, a slid- 15 means of connectionbetween said rotatable post andsaid rotatable cylinder whereby-uponmoveable 'i'atch member having a nose portion in latching engagementwith said locking nose portion, an elongated bar having one end fastenedto said cylinder and its other end operatively connected to saidrotatable post whereby upon movement of said pins out of interlockingposi tion the said spring rotates said post, a cam memmoved intoengagement with a Stationary part of a door 6. A loci: of the kinddescribed in combination, a latching frame member having a pivotallymounted locking nose portion, a sliding latch for preventing pivoting ofsaid locking nose portion, a spring actuated rotatable post adapted tomove said sliding latch out of latching relationship with saidlockingnose portion and mechanism for preventing rotation of said postincluding a plug member having a keyway and oppositely disposedperipheral openings communicating said keyway; rotatable cylinders onopposite sides oi said plug member, a gear segment fixed to eachcylinder and in continuous mesh with each other,- each cylinder havingrecesses adapted to be aligned with said openings and spring pressedplunger pins in said aligned recesses and openin'gs for interlockingsaid plug and cylinders and being adapted to be moved out ofinterlocking positions by the insertion of a key into said keywaywhereby said cylinders are "permitted to rotate. i V I JOHN C. BAR'I'HO.

